Emergency lighting system with integrated testing and reporting functionality

ABSTRACT

An emergency lighting system provides testing and reporting functionality in a rapidly repeatable fashion for environments with numerous emergency lighting units. In one or more embodiments, the emergency lighting system comprises a plurality of emergency lighting units capable of conducting one or more tests and reporting their operating condition as test results. One or more terminals receive and aggregate the test results and present the same to a user. Emergency lighting units having an undesirable operating condition can then be readily identified and addressed.

BACKGROUND OF THE INVENTION Field of the Invention

The invention relates to lighting systems and in particular to anemergency lighting system with integrated testing and reportingfunctionality.

Related Art

Lighting is important for providing illumination to an environment,especially where the environment would otherwise be dark. Withoutlighting, occupants of an environment could have great difficultyconducting their affairs. This is especially the case in the event of anemergency. Even properly installed lighting can fail for a variety ofreasons.

From the discussion that follows, it will become apparent that thepresent invention addresses the deficiencies associated with the priorart while providing numerous additional advantages and benefits notcontemplated or possible with prior art constructions.

SUMMARY OF THE INVENTION

An emergency lighting system is disclosed herein. The emergency lightingsystem provides testing and reporting functionality for environmentswith numerous emergency lighting units, such as commercial, industrial,or retail environments. The testing and reporting functionality rapidlyidentifies undesirable operating conditions at a plurality of emergencylighting units, allowing such operating conditions to be addressed. Inaddition, tests and test reports can be repeatedly generated to helpensure the emergency lighting units are operational should an emergencyoccur.

Various embodiments of an emergency lighting system are disclosedherein. In one exemplary embodiment, an emergency lighting systemcomprises one or more terminals that send one or more start commands andreceive a plurality of test results via one or more communicationdevices, and a plurality of individual power systems for a plurality oflighting devices.

Each power system comprises a fixture identifier, one or more powersupplies that receive power from a power source, one or more batteries,one or more communication devices that receive the start commands, oneor more switches that actuate upon receipt of the start commands, andone or more sensors that determine an operating condition of theplurality of lighting devices after the switches are actuated.

The communication devices transmit a test result comprising theoperating condition and the fixture identifier to the terminals. Theterminals present the plurality of test results to a user after theplurality of test results are received as well. The sensors may alsodetermine an operating condition of the batteries.

It is contemplated that the terminals may present the plurality of testresults on a display, output the plurality of test results via aprinter, or both. The operating condition may be a normal operatingcondition, a warning operating condition, a failure operating condition,or an unknown operating condition.

One or more storage devices may be included as well. The terminals storethe plurality of test results in a database on the storage devices. Theplurality of emergency lighting units may also comprise one or morecontrollers that validate the start commands.

In another exemplary embodiment, an emergency lighting system for abuilding is disclosed, with such emergency lighting system comprising aplurality of individual power systems for a plurality of lightingdevices, and one or more terminals comprising a display.

Each of the power systems comprise one or more batteries, one or morecommunication devices that receive one or more start commands, one ormore switches that actuate upon receipt of the start commands, and oneor more sensors that determine an operating condition of the lightingdevices after the switches are actuated. The operating condition may bea normal operating condition, a warning operating condition, a failureoperating condition, or an unknown operating condition.

The communication devices transmit a test result comprising theoperating condition and the fixture identifier. The terminals receiveand present a plurality of test results once a plurality of test resultshave been received.

The terminals may transmit the start commands, output the plurality oftest results via a printer, or both. In addition, the plurality ofemergency lighting units may have a power supply in electricalcommunication with the batteries. The terminals may store the pluralityof test results in a database on one or more storage devices of theemergency lighting system. The plurality of emergency lighting units mayinclude one or more controllers that validate the start commands aswell.

Various methods are disclosed herein as well. For instance, in oneexemplary method, emergency lighting is provided with an emergencylighting system having a plurality of power systems for a plurality oflighting devices. Each of the power systems comprise a fixtureidentifier, one or more switches, and one or more communication devices.

The method includes receiving one or more start commands at thecommunication devices, actuating the switches in response to receipt ofthe start commands, determining an operating condition of the pluralityof lighting devices via the sensors after the switches are actuated, andtransmitting a test result comprising the fixture identifier and theoperating condition from the communication devices of each of theplurality of lighting devices. After a plurality of test results aretransmitted, the plurality of test results are presented at one or moreterminals. The operating condition may be a normal operating condition,a warning operating condition, a failure operating condition, or anunknown operating condition.

It is contemplated that the start commands may be transmitted from theterminals. The plurality of test results may be stored in one or moredatabases. In addition, the start commands may be validated with acontroller of the plurality of emergency lighting units. The switchesmay activate the lighting devices when actuated as well.

Other systems, methods, features and advantages of the invention will beor will become apparent to one with skill in the art upon examination ofthe following figures and detailed description. It is intended that allsuch additional systems, methods, features and advantages be includedwithin this description, be within the scope of the invention, and beprotected by the accompanying claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The components in the figures are not necessarily to scale, emphasisinstead being placed upon illustrating the principles of the invention.In the figures, like reference numerals designate corresponding partsthroughout the different views.

FIG. 1 is a block diagram illustrating an exemplary emergency lightingsystem in an environment of use;

FIG. 2 is a block diagram of an exemplary emergency lighting unit;

FIG. 3 is a block diagram of an exemplary terminal;

FIG. 4 is an exemplary terminal and reporting screen;

FIG. 5 is a flow diagram illustrating operation of an exemplaryemergency lighting system;

FIG. 6 is a flow diagram illustrating operation of an exemplaryemergency lighting system; and

FIG. 7 is a flow diagram illustrating testing with an exemplaryemergency lighting system.

DETAILED DESCRIPTION OF THE INVENTION

In the following description, numerous specific details are set forth inorder to provide a more thorough description of the present invention.It will be apparent, however, to one skilled in the art, that thepresent invention may be practiced without these specific details. Inother instances, well-known features have not been described in detailso as not to obscure the invention.

The emergency lighting system herein has integrated testing andreporting functionality, which is advantageous for discovering failureconditions at individual lighting elements before the emergency lightingsystem is needed, and readily identifying whether the emergency lightingsystem and the lighting and other elements thereof are functional or ina failure condition. This is especially useful in setting with amultitude of emergency lighting units, such as for example, a hotel,factory, office, store, apartment building, or other residential,commercial, or industrial facility.

Traditionally, testing of emergency lighting units is a time-consumingprocess whereby individual lighting fixtures are manually testedaccording to a periodic schedule, as may be defined or required by localregulations. In facilities having a large number of emergency lightingunits, this can be a time-consuming and expensive endeavor. In addition,the potential exists for a failure to occur immediately after a test andthereby be left undiscovered until the next test. The emergency lightingsystem herein provides rapid testing and reporting for emergencylighting units in an automated fashion, that can also be rapidlyrepeated at little cost.

FIG. 1 illustrates an embodiment of an emergency lighting system in anexemplary environment of use. As can be seen, the exemplary environment104 is an office having a number of offices 108, restrooms 112, andcubicles 116. Doors 120 provide for ingress and egress into and out ofthese areas. In addition, stairs 124 provide an emergency exit from thisexemplary office 104, in the event of an emergency. It is contemplatedthat an environment may be an indoor or outdoor area and may comprise aplurality of indoor or outdoor areas in some embodiments.

An emergency lighting system may comprise a plurality of emergencylighting units 128 installed at various locations. Ideally, emergencylighting units 128 will be located where they can best inform or alertoccupants as to emergency conditions and the location of an emergencyexit, such as with directional indicators, signage or other indicators.As can be seen, an emergency lighting unit 128 is located in every areaof the exemplary environment 104 of FIG. 1. In this manner, occupants ofvarious areas of the environment 104 can readily see an emergencylighting unit 128, in the event of an emergency.

In one or more embodiments, emergency lighting units 128 may optionallycommunicate through one or more gateways 132. In general, a gateway 132facilitates communication between one or more emergency lighting units128 and another device, such as a terminal 136 or another emergencylighting unit. A gateway 132 is optional since the emergency lightingunits 128 may be capable of communicating directly with a terminal 136,other emergency lighting units 128, or other devices in one or moreembodiments. Typically, a gateway 132 will be provided whencommunication with a device on another network or a device that isotherwise incapable of communicating with the emergency lighting units128 is desired.

A gateway 132 may comprise one or more first communication devices andone or more second communication devices for such purposes. Forinstance, a gateway 132 may have a first communication device forcommunicating with one or more emergency lighting units 128 and a secondcommunication device for communicating with one or more terminals 136.In one or more embodiments, the first communication device and secondcommunication device may utilize distinct networks, communication links,or communication protocols.

FIG. 2 illustrates an exemplary emergency lighting unit 128. It will beunderstood that the components thereof may be interconnected in variousways. As can be seen, in one or more embodiments, an emergency lightingunit 128 may comprise one or more lighting devices 212 and powersupplies 224, batteries 220, or both. A lighting device 212 may compriseone or more LEDs, light bulbs, or other devices that provideillumination.

One or more electrical connections 144 may be provided to connect alighting device 212 to a power supply 224, battery 220, or othercomponent of an emergency lighting unit 128. An electrical connection144 may be permanent, such as a soldered connection. Alternatively, anelectrical connection 144 may permit a lighting device 212 to bedisconnected and reconnected, such as by providing a wire terminal,socket, outlet, or the like.

A power supply 224, battery 220, or both may be provided to power thelighting device 212. Typically, a power supply 224 will receive powerfrom an external power source 228, such as an outlet, to power anemergency lighting unit 128. In one or more embodiments, a power supply224 may convert input power to a voltage and amperage particular to thespecifications of an emergency lighting unit 128. In addition, a powersupply 224 may convert AC to DC power (or vice versa if desired).

A power supply 224 may be used to charge a battery 220 of an emergencylighting unit 128 as well. A battery 220 will typically be used as abackup power source for an emergency lighting unit 128 to power theemergency lighting unit if external power is no longer available (i.e.,during a power outage). Alternatively, it is contemplated that a battery220 may solely be used to power an emergency lighting unit 128 in someembodiments. In such embodiments, a power supply 224 need not beprovided.

A controller 204 may be provided to facilitate an emergency lightingunit's testing and reporting capability. In one or more embodiments, acontroller 204 may be a microprocessor or other integrated circuit thatcontrols the operation of the components of an emergency lighting unit128. A controller 204 may execute instructions to provide thefunctionality disclosed herein. Such instructions may be stored on anon-transient memory or storage device, such as a data storage drive,ROM, or the like. Alternatively, instructions may be hardwired into thecontroller 204, such as in an internal memory or storage device, or inthe circuitry of the controller itself.

A controller 204 may also detect emergencies and activate a lightingdevice 212 as a result. For example, a controller 204 may detect whenthere is a power loss or other failure at a power supply 224 and power alighting device 212 with a battery 220 in response to the same.Alternatively or in addition, a controller 204 may detect smoke or othercontaminants, high or low temperatures, or other environmentalconditions indicative of an emergency, such as via one or more sensors216, and activate a lighting device 212 in response.

Various components of an emergency lighting unit 128 may be tested usingone or more sensors 216. For example, a lighting device 212, battery220, or both may be tested. A power supply 224, or other components ofan emergency lighting unit 128, may also or alternatively be tested.Additional details regarding testing will be described below.

It is contemplated that one or more switches 232, relays, or the likemay be provided in some embodiments. A switch 232 may be used todisconnect or deactivate one or more components of an emergency lightingunit 128. Typically, such functionality will be used for testingpurposes. To illustrate, the switch 232 of FIG. 2 may be used todisconnect the power supply 224, such as to test function of the battery220, lighting device 212, communication device 208, or other componentof an emergency lighting unit 128 when the power supply 224 fails toprovide power. Though shown associated with a power supply 224, it iscontemplated that one or more switches 232 may be in electricalcommunication with various other components of an emergency lightingunit 128 to test the functionality of the same if one of thesecomponents is disconnected. As alluded to herein, an emergency lightingunit 128 may have duplicate components for redundancy. A switch 232 maybe associated with the same to test redundant or primary components.

An emergency lighting unit 128 may have one or more enclosures 240 forhousing its components. An enclosure 240 may provide a water orweathertight housing in one or more embodiments. One or more openingsmay be provided to permit passage of light, sound, or both from anenclosure 240.

Though described herein primarily with regard to lighting devices 212,it is contemplated that various types of output devices may be used. Forexample, one or more audible alarms, speakers, or the like may beprovided with an emergency lighting unit 128 with or without a lightingdevice 212. During an emergency, a speaker or other output device may beactivated in addition to or instead of a lighting device 212 in one ormore embodiments. It is contemplated that an emergency lighting unit 128may be provided in the form of a light fixture, lighted signage, alarm,or the like in one or more embodiments.

Various components of an emergency lighting unit 128 may form a powersystem 236. A power system 236 may power a lighting device 212 (or otheroutput device) during an emergency, during non-emergency conditions(i.e., normal condition), or both. In addition, a power system 236 mayprovide testing and reporting functionality for lighting devices 212 orother components of an emergency lighting unit 128, as disclosed herein.As can be seen from FIG. 2, a power system 236 may comprise one or morepower supplies 224, controllers 204, switches 232, batteries 220,communication devices 208, sensors 216, or various subsets thereof. Itis contemplated that a power system 236 may be used to retrofit existinglight fixtures or other devices to provide the functionality disclosedherein.

It is contemplated that a testing system may be provided in someembodiments to retrofit existing light fixtures or other devices toprovide the functionality disclosed herein. In one or more embodiments,a testing system may comprise one or more controllers, 204,communication devices 208, sensors 216, or various subsets thereof. Ingeneral, a testing system would perform tests to determine and reportone or more operating conditions of the light fixture or other device towhich it is connected. A testing system may include a battery in someembodiments, such as to provide backup power. In one or moreembodiments, a testing system may connected to an existing lightingdevice 212, power supply 224, or both to retrofit the same to providethe testing and reporting functionality as disclosed herein.

FIG. 3 illustrates an exemplary terminal 136. As discussed, a terminal136 may receive test results and other information from one or moreemergency lighting units 128. Test results may be presented to users viaa terminal 136. In addition, tests may be initiated and aborted from aterminal 136 in one or more embodiments.

A terminal 136 may be a computing device in one or more embodiments,such as a computer, tablet, smartphone or the like. As can be seen fromFIG. 3, a terminal 136 may comprise one or more processors 304, storagedevices 308, memory devices 316, and communication devices 312. Aterminal may also comprise one or more input or output devices. Forexample, a terminal 136 may have one or more displays 320, and HIDs(human input devices) 324. A terminal 136 may also have one or moreoutput devices 328, such as printers or speakers.

A terminal 136 will typically execute instructions via a processor 304to provide the functionality disclosed herein. Such instructions may bestored as machine readable code on a non-transient storage device 308(excluding carrier waves and electronic signals transmitted via wired orwireless communication links), or be hardwired into the processor 304.Some exemplary storage devices 308 include magnetic, flash, or opticaldrives. Alternatively or in addition, the instructions may be hardwiredinto a processor 304. A terminal 136 may utilize a memory device 316,such as one or more RAM modules, for temporary storage during itsoperation.

Communication with one or more emergency lighting units or other devicesmay occur via wired or wireless connections provided by one or morecommunication devices 312. Some exemplary communication devices 312include wired or wireless network interfaces/cards, transmitters,receivers, or transceivers. It is contemplated that variouscommunication protocols, now known or later developed, may be used tofacilitate communication. Some exemplary protocols include Ethernet,WIFI, BLE (BLUETOOTH Low Energy), ZIGBEE, NB-IOT, NFC, RFID, SIGFOX,WEIGHTLESS, ANT, DIGIMESH, MIWI, Z-WAVE, BACNET, LORA, and variouscellular network protocols. Communication may be facilitated by one ormore gateways, as described above.

One or more HIDs 324 may be included to receive user input. Someexemplary HIDs 324 include touch screens, keyboards, pointing devices,and the like. A display 320 will typically be used to presentinformation, such as test results, to a user. Test results or otherinformation may also or alternatively be presented via printouts, or thelike, such as through a terminal's output device 328.

A terminal 136 may execute machine readable code fixed on anon-transient storage medium, such as in the form of a softwareapplication to provide the functionality herein, as will be describedfurther below. It is contemplated that a terminal 136 may alternativelybe a limited purpose testing device in one or more embodiments. Forinstance, in one embodiment, a terminal 136 may be a testing device onlycapable of initiating tests and receiving the results thereof forpresentation to a user.

FIG. 4 illustrates an exemplary terminal 136 of an emergency lightingsystem. As can be seen, a terminal 136 may present, among other things,the status of one or more emergency lighting units 128, test resultsthereof, or both. In the embodiment of FIG. 4, a test result is shown ingraphical form with a graphical representation of the environment 104and the emergency lighting units 128 therein. As can be seen, a testresult will typically comprise the status of each emergency lightingunits 128 in an environment 104. A test result may also indicate thelocation of each emergency lighting unit 128.

One or more status indicators 416, 420 may be presented to indicate acurrent status of one or more emergency lighting units 128. For example,one or more first status indicators 416 may be presented in associationwith one or more emergency lighting units 128 that are in a failurecondition. One or more distinct second status indicators 420 may bepresented in association with one or more emergency lighting units 128in a different condition, such as in an unknown condition or in awarning condition. An unknown condition may be indicated for emergencylighting units 128 that fail to communicate. A warning condition may beindicated for emergency lighting units 128 that are have characteristicsthat indicate a failure is imminent or about to occur. In general, anemergency lighting unit 128 that is not capable of illuminating orotherwise activating during an emergency, such as during a loss ofexternal power, would be deemed to be in a failure condition. One ormore status indicators may be used to indicate an emergency lightingunit 128 is in a nominal or normal operating condition. Alternatively,no status indicator may be presented in association with emergencylighting units 128 in a nominal condition.

Though shown in a graphical representation, it is noted that testresults may be presented in tabular or other text form, with textindicating the status of the emergency lighting units 128 therein. Thelocation of individual emergency lighting units 128 may also bepresented textually, such as via a description or label.

Appropriate personnel may take action to remedy undesired operatingconditions by reviewing the test results to determine which emergencylighting units 128 need attention, such as those in a warning, unknown,or failure operating condition. Remedies may include replacement orrepair of batteries or other components or entire emergency lightingunits 128. If all emergency lighting units 128 are found to be in anormal operating condition, the test result indicating the same may bekept for record keeping purposes. It is contemplated that such testresult may be used to satisfy regulatory requirements.

As described above, a terminal 136 may also be used to control tests. Asshown in FIG. 4 for example, the terminal 136 provides a number ofcontrols 404, 408, 412 for controlling tests and sharing test results.Specifically, a “Start Test” button 404 and “End Test” button 408 areprovided to start and end a test. In one or more embodiments, engaging a“Start Test” button 404 or the like would cause the terminal 136 totransmit a signal or command to initiate testing at the emergencylighting units 128. Engagement of an “End Test” button 408 or the likewould end a test that is currently in progress, also by transmitting acorresponding signal or command. Once a test is completed, the resultsmay be sent to other terminals 136 or devices, or printed, such as byengaging the “Share Results” button 412 or the like. Correspondingsignals or commands would then be transmitted from the terminal 136.

FIG. 5 is a flow diagram illustrating operation of an exemplaryemergency lighting system during testing. At a step 504, a start commandmay be transmitted, such as by a terminal, to initiate a test of theemergency lighting units of an emergency lighting system. A start testcommand may be broadcast to a plurality of emergency lighting units. Ata decision step 508, it may be determined by one or more emergencylighting units, if a start command has been received. A start commandmay include a start command identifier, such as one or more sequences ofcharacters or other data, that identifies it as a start command whenreceived. To illustrate, a start command transmitted from a terminal mayinclude a character string such as “START_COMMAND” or other predefineddata to identify it as a start command.

If, at decision step 508, a transmission is received that is not a startcommand, an emergency lighting unit may continue to await new commands,as represented by the arrow returning to step 504 in FIG. 5. If it isdetermined at decision step 508, that a start command has been received,the start command may be validated at a decision step 512.

As indicated by the broken lines of decision step 512, validation may beoptional in one or more embodiments. In general, validation willvalidate or authenticate a start command such that unauthorized startcommands do not activate tests. Validation may occur in various ways.For example, a terminal may transmit a start command with a pre-sharedkey or code that is compared to a pre-shared-key or code stored on amemory device or controller of an emergency lighting unit.Alternatively, a terminal may transmit a username, password, or bothalong with a start command.

In yet another embodiment, a terminal may encrypt a start command, orportion thereof, such as with one or more encryption keys, or include ahash of a start command, or portion thereof, such as with a shared salt.It is contemplated that communication from a terminal may be encryptedor signed in various ways, which can then be used by an emergencylighting system's emergency lighting units to validate suchcommunication, including start commands.

If an emergency lighting unit determines the start command is valid atdecision step 512, the start command may be relayed or sent to otheremergency lighting units at a step 516. In one or more embodiments, thismay occur by retransmitting a received start command via a communicationdevice of an emergency lighting unit. Relaying start commands can beadvantageous in environments where a terminal's start command may not bereceived by all emergency lighting units a user wishes to test. Forexample, a start command may need to be relayed if it is to reachemergency lighting units on multiple floors of a building. It iscontemplated that a gateway may be used to facilitate transmission of astart command (or other communication). As indicated by the broken linedepiction of step 516, relaying a start command may be optional in oneor more embodiments. If a start command is not valid at decision step512, an emergency lighting unit may continue to await additionalcommands.

At a step 520, testing may commence at an emergency lighting unit. Ingeneral, a test will discern whether an emergency lighting unit will beoperational in an emergency, as will be described further below. A testresult, including the operational condition of the tested emergencylighting unit, will be generated by the emergency lighting unit, at astep 524, based on the test. For example, a test result may indicatewhether one or more emergency lighting units are in a nominal, failure,unknown, or warning condition. A test result may also include otherinformation, such as one or more timestamps (e.g., test start and testcompletion times), a terminal identifier uniquely identifying theterminal that transmitted the start command, a user identifieridentifying the user logged in to the terminal that transmitted thestart command, or other information.

A fixture identifier of an emergency lighting unit may be combined withits test result at a step 528 to identify the emergency lighting unit towhich the test result applies. Typically, the identifier will be aunique identifier that allows a particular emergency lighting unit to beidentified. At a step 532, the test result, including the associatedemergency lighting unit identifier, may be transmitted from theemergency lighting unit, via a communication device thereof.

Individual test results will typically be transmitted by a plurality ofemergency lighting units to one or more terminals for aggregation andpresentation to one or more users at a step 536. An exemplarypresentation of aggregated test results is illustrated in FIG. 4. It iscontemplated that test results may be presented as they are received,according to a set refresh period, or once a threshold number of testresults are received.

Test results may be stored at a step 540, such as by or at one or moreterminals. This generates a record of test results that may besubsequently retrieved. It is contemplated that a terminal may transmittest results to a remote database server or other storage device forstorage. Typically, test results will be stored in a schema thatfacilitates retrieval or queries of specific or bulk test results. Aterminal may be used to retrieve or query stored test results. Forexample, a terminal may be used to query test results for a particulartime period, that exhibit particular operating condition(s), or both.

It is contemplated that testing may occur in continuously orautomatically on a predefined schedule or period. For example, in one ormore embodiments, a terminal may be configured to transmit test startcommands according to a predefined schedule or period. Alternatively, atest start command may instruct emergency lighting units to continuouslyor periodically test and report operating conditions. Real time or closeto real time reporting can be obtained in this manner. Emergencylighting units may be configured to continuously test and reportoperating conditions. It is contemplated that operating conditions maybe only reported when changed in some embodiments.

FIG. 6 illustrates operation of an exemplary emergency lighting systemwhen testing is to be aborted or ended. This may occur when a userengages an “End Test” button, such as described above. At a step 604, anend test command may be transmitted from a terminal. An end test commandmay be broadcast to a plurality of emergency lighting units. At adecision step 608, an emergency lighting unit may determine whether areceived transmission is an end test command. A transmission may bedeemed an end test command when it possesses a particular sequence ofcharacters (e.g., “END_TEST”) or data, such as described above withregard to the start test command.

If an end test command is not received at decision step 608, emergencylighting units may continue to await new commands, as represented by thereturn to step 604 in FIG. 6. If an end test command is received, theend test command may be validated at a decision step 612. Validation ofan end test command may occur in the same manners as described abovewith regard to validation of start test commands. For example, an endtest command may be validated by a pre-shared key, hash, username,password, encryption, or signature. It is noted that validation may beoptional in one or more embodiments, as illustrated by the broken linedepiction of decision step 612.

Assuming validation occurs, if the end test command is not valid, theemergency lighting units may continue to await new commands, asrepresented by the return to step 604 in FIG. 6. If the end test commandis validated, the end test command 616 may be relayed or sent from theemergency lighting unit that received it, such as to ensure allemergency lighting units receive the end test command. Relaying of anend test command can aid in ensuring the command reaches all desiredemergency lighting units. As indicated by the broken lines, relaying theend test command may be optional in one or more embodiments.

At a step 620, any ongoing test may be aborted or otherwise ended.Typically, this will place an emergency lighting unit in the conditionit was prior to the test. For instance, any switches that were actuatedmay be actuated to their earlier position or state. Thereafter, aconfirmation may be transmitted from an emergency lighting unit, at astep 624, to indicate that testing has indeed ended at the particularemergency lighting unit. The confirmation will typically include theunique fixture identifier for the emergency lighting unit transmittingthe confirmation. A user identifier and other information may beincluded in the confirmation as well. Transmission of a confirmation atstep 624 is optional, as indicated by the broken line depiction thereof.

FIG. 7 is a flow diagram illustrating operation of an exemplaryemergency lighting system when a test is conducted. Typically,individual tests will be conducted at a plurality of individualemergency lighting units. At a step 704, one or more particularcomponents may be selected for testing. For example, a battery, lightingdevice, power supply, or various subsets thereof may be selected fortesting. The selection may be defined by information in a test startcommand from a terminal. For example, one or more test types may bespecified in a test start command indicating whether a predefined subsetof components or all components should be tested. Each test type may beassociated with one or more switches and switch states or positions. Inthis manner, a test of a particular type may be conducted by actuatingthe associated one or more switches.

As can be seen by the broken line depiction of step 704, selection of acomponent or components may be optional in one or more embodiments. Inone or more embodiments, the same predefined set of one or morecomponents may be tested thus negating the need to select or otherwisespecify which components of an emergency lighting unit are to be tested.For instance, in one embodiment, only the battery of an emergencylighting system's emergency lighting units may be tested. Alternatively,only the lighting device may be tested in some embodiments. In yetanother exemplary embodiment, only the battery and lighting device ofeach emergency lighting unit may be tested.

At a step 708, one or more switches may be actuated to disconnect ordisable one or more components. Thereafter, the operating condition ofthe emergency lighting unit being tested can be determined at a step712. To illustrate with reference to FIG. 2, one or more switches 232may be actuated to disconnect a power supply 224, power source 228 orboth to verify that a lighting device 212 is still operational via powerfrom a battery 220. In another test, one or more switches 232 may beactuated to activate a lighting device 212 to verify that it illuminatesto a particular luminosity, or to initiate power output from a battery220 to verify that it has a particular power output. Likewise, one ormore switches 232 may be actuated to activate various other components,such as a communication device 208, to verify their operation. Thoughshown externally, it is contemplated that one or more switches 232 maybe internal to the components of an emergency lighting unit.

As stated, one or more sensors 216 may be utilized to determine theoperating condition of an emergency lighting unit during a test. It iscontemplated that various sensors 216 may be provided with an emergencylighting unit 128. For example, an emergency lighting unit 128 maycomprise one or more voltage, current, light, or other electromagneticsensors 216, or various subsets thereof. During a battery test forexample, one or more sensors 216 may measure the voltage output, currentoutput, or other characteristic of a battery's output to determine itsoperating condition. A power supply's output may be tested in a similarmanner.

During a lighting device test, a light sensor may measure the lightoutput of a lighting device 212 to determine its operating condition.Components may be tested indirectly as well. For example, a sensor 216may measure the voltage draw, current draw, or both of a lighting device212 to determine its operating condition.

At step 712, the operating condition of a component may be categorizedinto a predefined set of operating conditions, such as the nominal,warning, or failure operating conditions disclosed above. In one or moreembodiments, a controller 204 will receive measurements or other sensorinformation from one or more sensors 216 and categorize the sensorinformation based on one or more predefined thresholds or rangesassociated with each operating condition. To illustrate, a nominaloperating condition may have a first luminosity threshold or range, awarning operating condition may have a second distinct luminositythreshold or range, and a failure operating condition may have a thirddistinct luminosity threshold or range, for a lighting device 212 test.Similarly, a battery or power supply test may have individual distinctvoltage ranges, current ranges, or both for each of its operatingconditions. It is contemplated that only a normal and failure operatingcondition may be provided in some embodiments. In one or moreembodiments, the thresholds or ranges may decrease from nominal towarning to failure operating conditions.

At a decision step 716, one or more tests can be repeated one or moretimes if desired. For example, a battery test may be repeated to obtaina mean value or median value for determining the operating condition atstep 712. This can provide increased accuracy. Typically, a test willonly be conducted a single time per start test command. Once one or moretests are complete the operating condition determined at step 712 may beused in generating a test result at step 524 of FIG. 5, such as shown.

Though its operation is illustrated in a particular sequence with regardto FIG. 5-7, it is noted that in various embodiments of the emergencylighting system, the above steps may occur in a different order. Inaddition, though particular steps are illustrated as optional by theirdepiction in broken lines, it is noted that one or more of the othersteps may be made optional in various embodiments of the emergencylighting system.

It is noted that, in some embodiments, one or more tests may beconducted without receipt of a test start command. For example, if asensor should detect a warning or failure operating condition, a testresult indicating the same may be automatically transmitted to one ormore terminals. In this manner, operating conditions requiring attentionmay be readily monitored.

While various embodiments of the invention have been described, it willbe apparent to those of ordinary skill in the art that many moreembodiments and implementations are possible that are within the scopeof this invention. In addition, the various features, elements, andembodiments described herein may be claimed or combined in anycombination or arrangement.

1. An emergency lighting system for a building comprising: one or moreterminals that send one or more commands and receive a plurality of testresults; and a plurality of emergency lighting units comprising: one ormore lighting devices; one or more wireless communication devices thatwirelessly receive the one or more commands and relay the one or morecommands; one or more sensing devices that determine an operatingcondition of the one or more lighting devices after the one or morecommands are received; wherein the one or more wireless communicationdevices wirelessly transmit one or more test results comprising theoperating condition to the one or more terminals; wherein the one ormore terminals present the one or more test results from the pluralityof emergency lighting units to a user.
 2. The emergency lighting systemof claim 1, wherein the plurality of emergency lighting units furthercomprise a power supply and one or more batteries, wherein the one ormore communication devices and the one or more sensing devices arepowered by at least one of the one or more batteries when determiningthe operating condition and wireles sly transmitting the one or moretest results.
 3. The emergency lighting system of claim 1, wherein theone or more commands cause the one or more sensing devices toperiodically or continuously determine the operating condition of theplurality of emergency lighting units.
 4. The emergency lighting systemof claim 1, wherein the operating condition is selected from the groupconsisting of a normal operating condition, a warning operatingcondition, a failure operating condition, and an unknown operatingcondition.
 5. The emergency lighting system of claim 1, wherein theplurality of emergency lighting units validate the one or more commandsbefore relaying the one or more commands.
 6. The emergency lightingsystem of claim 1 further comprising one or more storage devices,wherein the one or more terminals store the one or more test results ina database on the one or more storage devices.
 7. The emergency lightingsystem of claim 1, wherein the plurality emergency lighting unitscomprise one or more controllers that validate the one or more commands.8. An emergency lighting system for a building comprising: a pluralityof emergency lighting units comprising: one or more lighting devices;one or more wireless communication devices that wireles sly receive oneor more commands, and relay the one or more commands; one or moresensing devices that determine an operating condition of the one or morelighting devices upon receipt of the one or more commands; wherein theone or more wireless communication devices wirelessly transmit one ormore test results comprising the operating condition.
 9. The emergencylighting system of claim 8 further comprising one or more terminalscomprising a display, wherein the one or more terminals receive andpresent a plurality of test results once a plurality of the one or moretest results have been received from the plurality of emergency lightingunits.
 10. The emergency lighting system of claim 8, wherein the one ormore commands cause the one or more sensing devices to periodically orcontinuously determine the operating condition of the one or morelighting devices.
 11. The emergency lighting system of claim 8, whereinat least one of the plurality of emergency lighting units validates theone or more commands before relaying the one or more commands.
 12. Theemergency lighting system of claim 8, wherein the operating condition isselected from the group consisting of a normal operating condition, awarning operating condition, a failure operating condition, and anunknown operating condition.
 13. The emergency lighting system of claim8 further comprising one or more storage devices, wherein the one ormore test results are stored in a database on the one or more storagedevices.
 14. The emergency lighting system of claim 8, wherein theplurality of emergency lighting units further comprise a power supplyand one or more batteries, wherein the one or more communication devicesand the one or more sensing devices are powered by at least one of theone or more batteries when determining the operating condition andwirelessly transmitting the one or more test results.
 15. A method ofproviding emergency lighting via an emergency lighting system comprisinga plurality of lighting devices, the method comprising: wireles slyreceiving one or more commands at a plurality of individual testingsystems connected to the plurality of lighting devices, each of theplurality of individual testing systems comprising one or more sensingdevices and one or more wireless communication devices; relaying the oneor more commands via the one or more wireless communication devices;determining an operating condition of the plurality of lighting devicesvia the one or more sensing devices after receiving the one or morecommands; wirelessly transmitting one or more test results comprisingthe operating condition via the one or more wireless communicationdevices of each of the plurality of lighting devices; and presenting theone or more test results at one or more terminals.
 16. The method ofclaim 15, wherein the plurality of individual testing systems areconnected to a power supply and one or more batteries and are powered byat least one of the one or more batteries when determining the operatingcondition and wirelessly transmitting the one or more test results. 17.The method of claim 15, wherein the operating condition is selected fromthe group consisting of normal operating condition, a warning operatingcondition, a failure operating condition, and an unknown operatingcondition.
 18. The method of claim 15 further comprising storing the oneor more test results in one or more databases.
 19. The method of claim15 further comprising validating the one or more commands with acontroller of the plurality of individual testing systems.
 20. Themethod of claim 15, wherein the one or more commands cause the one ormore sensing devices to periodically or continuously determine theoperating condition of the plurality of lighting devices.